:root{--bg:#f5f5f2;--panel:#fbfbf8;--surface:#fff;--surface-muted:#f9f9f5;--surface-disabled:#eeeeea;--border:#d6d4cb;--border-strong:#c8c7c1;--text:#1c1f24;--muted:#454950;--subtle:#747168;--disabled:#97958d;--error:#9a3412;--ok:#23613a;--focus:#1c1f24;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:IBM Plex Sans,Aptos,Segoe UI,sans-serif}:root[data-theme=dark]{--bg:#111315;--panel:#181b1f;--surface:#20242a;--surface-muted:#171a1e;--surface-disabled:#24282e;--border:#343a42;--border-strong:#4a515b;--text:#eef0f3;--muted:#c2c7cf;--subtle:#8f98a6;--disabled:#737b86;--error:#ffb08a;--ok:#8fe3a8;--focus:#f4f6f8;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);min-width:320px;min-height:100vh;margin:0}button,input,select,textarea{font:inherit}button,select,input{border:1px solid var(--border-strong);background:var(--surface);color:var(--text);border-radius:6px}button{cursor:pointer;padding:.6rem .8rem}button:hover:not(:disabled){border-color:var(--focus)}button:disabled{color:var(--disabled);cursor:not-allowed;background:var(--surface-disabled)}.app-shell{background:var(--bg);grid-template-columns:minmax(420px,1fr) minmax(380px,.9fr);gap:1rem;min-height:100vh;padding:1rem;display:grid}.left-panel,.right-panel{border:1px solid var(--border);background:var(--panel);border-radius:10px;flex-direction:column;gap:1rem;padding:1rem;display:flex}.tape-panel{border:1px solid var(--border);background:var(--surface);border-radius:8px;padding:1.25rem .75rem 1.8rem;position:relative;overflow:hidden}.tape-strip{grid-template-columns:repeat(21,minmax(38px,1fr));gap:.35rem;transition:transform .22s,opacity .18s;display:grid}.tape-cell{border:1px solid var(--border);background:var(--surface-muted);border-radius:6px;flex-direction:column;justify-content:center;align-items:center;min-height:70px;display:flex}.tape-cell.head{border-color:var(--focus);box-shadow:inset 0 0 0 2px var(--focus)}.cell-index{color:var(--subtle);font-size:.7rem}.cell-symbol{font-family:IBM Plex Mono,SFMono-Regular,Consolas,monospace;font-size:1.35rem;font-weight:700}.head-marker{border-left:7px solid #0000;border-right:7px solid #0000;border-bottom:10px solid var(--focus);width:0;height:0;position:absolute;bottom:.45rem;left:50%;transform:translate(-50%)}.controls{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.speed-control{white-space:nowrap;align-items:center;gap:.6rem;margin-left:auto;display:flex}.tape-navigation{flex-wrap:wrap;gap:.6rem;display:flex}.range-controls{grid-template-columns:repeat(2,minmax(180px,1fr));gap:.75rem;width:100%;display:grid}.range-control{gap:.35rem;min-width:0;display:grid}.range-control span{color:var(--muted)}.status-bar{border-top:1px solid var(--border);color:var(--muted);flex-wrap:wrap;gap:.8rem;padding-top:.8rem;display:flex}.state-status{align-items:center;gap:.5rem;display:inline-flex}.badge-row{flex-basis:100%}.machine-badge{border:1px solid var(--border-strong);color:var(--text);background:var(--surface);border-radius:999px;align-items:center;padding:.15rem .55rem;font-size:.75rem;display:inline-flex}.machine-badge.ntm{background:color-mix(in srgb, var(--surface) 70%, var(--focus) 30%)}.ntm-panel{gap:.75rem;display:grid}.choice-panel{border:1px solid var(--border);background:var(--surface);border-radius:8px;gap:.65rem;padding:.8rem;display:grid}.choice-list{gap:.55rem;display:grid}.choice-list button{text-align:left;justify-content:flex-start}.notice,.replay-bar{border:1px solid var(--border);background:var(--surface);color:var(--muted);border-radius:8px;padding:.7rem .8rem}.notice.warning{color:var(--error)}.replay-bar{justify-content:space-between;align-items:center;gap:.75rem;display:flex}.toolbar,.file-actions,.initial-fields{align-items:end;gap:.75rem;display:flex}.terminal-fields{gap:.75rem;display:grid}.toolbar{justify-content:space-between}.icon-button{justify-content:center;align-items:center;width:2.45rem;height:2.45rem;padding:0;font-size:1.15rem;line-height:1;display:inline-flex}.modal-backdrop{background:color-mix(in srgb, var(--bg) 70%, transparent);z-index:20;place-items:center;padding:1rem;display:grid;position:fixed;inset:0}.help-modal{border:1px solid var(--border);background:var(--panel);width:min(620px,100%);max-height:min(720px,90vh);color:var(--text);border-radius:12px;padding:1rem;overflow:auto;box-shadow:0 24px 80px #00000047}.modal-header{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.75rem;display:flex}.modal-header h2{margin:0;font-size:1.15rem}.help-modal h3{color:var(--text);margin:1rem 0 .45rem;font-size:.98rem}.help-modal p{color:var(--muted);margin:0 0 .85rem;line-height:1.5}.help-modal ul{color:var(--muted);margin:0 0 .85rem;padding-left:1.2rem}.help-modal li{margin-bottom:.45rem}.help-modal strong{color:var(--text)}label{color:var(--muted);flex-direction:column;gap:.35rem;font-size:.9rem;display:flex}select,input{padding:.55rem .65rem}input[type=range]{accent-color:var(--focus)}.editor-label{margin-bottom:-.6rem}textarea{resize:none;border:1px solid var(--border-strong);background:var(--surface);min-height:430px;color:var(--text);border-radius:8px;flex:1;padding:.85rem;font-family:IBM Plex Mono,SFMono-Regular,Consolas,monospace;line-height:1.45}.parse-errors{border:1px solid var(--border);background:var(--surface);min-height:3rem;color:var(--error);border-radius:8px;padding:.6rem .75rem;font-size:.9rem}.parse-errors p{margin:0 0 .3rem}.parse-errors p:last-child{margin-bottom:0}.ok{color:var(--ok)}.initial-fields label{flex:1}.terminal-states-input{flex:initial;resize:vertical;white-space:pre-wrap;min-height:4.8rem}@media (width<=900px){.app-shell{grid-template-columns:1fr}.tape-strip{grid-template-columns:repeat(21,42px);overflow:visible}.speed-control{width:100%;margin-left:0}.range-controls{grid-template-columns:1fr}.replay-bar{flex-direction:column;align-items:flex-start}}.tape-strip.shift-left{animation:.22s slide-left}.tape-strip.shift-right{animation:.22s slide-right}@keyframes slide-left{0%{opacity:.75;transform:translate(28px)}to{opacity:1;transform:translate(0)}}@keyframes slide-right{0%{opacity:.75;transform:translate(-28px)}to{opacity:1;transform:translate(0)}}
